91964739 has 4 divisors (see below), whose sum is σ = 122619656. Its totient is φ = 61309824.

The previous prime is 91964701. The next prime is 91964753. The reversal of 91964739 is 93746919.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 91964739 - 2²⁴ = 75187523 is a prime.

It is a super-3 number, since 3×91964739³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91964779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15327454 + ... + 15327459.

It is an arithmetic number, because the mean of its divisors is an integer number (30654914).

Almost surely, 2^91964739 is an apocalyptic number.

91964739 is a deficient number, since it is larger than the sum of its proper divisors (30654917).

91964739 is a wasteful number, since it uses less digits than its factorization.

91964739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30654916.

The product of its digits is 367416, while the sum is 48.

The square root of 91964739 is about 9589.8247637796. The cubic root of 91964739 is about 451.3780619900.

The spelling of 91964739 in words is "ninety-one million, nine hundred sixty-four thousand, seven hundred thirty-nine".